<PRE><B>Question 223804</B>
#1. Factor 10x^2+9x-9 
I came up with 10x^2+3(3x-3)
= (5x - 3)*(2x + 3)
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#2. Factor 2ax+2ay-bx-by
My answer is 2a(x+y)-b(x+y)
then combine the terms
= (2a-b)*(x+y)
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#3. Factor x(y-8)-7(8-y)
My answer is xy-8x-56-7y
(8-y) = -(y-8)
= (x+7)*(y-8)
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# 4. Factor 4-x^2
The difference of 2 squares, a^2 - b^2, is (a-b)*(a+b)
= (2-x)*(2+x)</PRE>